The advantage of this scenario is that while the requester must still know that some type of polling mechanism is being used, the service itself doesn't.

此方案的优势在于，虽然请求方仍然必须知道使用了某种类型的轮询机制，但服务本身并不必如此。

youdao

There are already several polling solutions popping up various specifications, so clearly there is a need for this type of solution.

目前存在多个轮询解决方案以及各种规范，这种现象清楚地说明了人们迫切地需要这种类型的解决方案。

youdao

All server and client implementations MUST support the "long-polling" connection type and SHOULD support "callback-polling". All other connection types are OPTIONAL.

所有服务端和客户端实现必须支持“长轮询”连接类型，并且应该支持“回调轮询”。其他连接类型都是可选的。

youdao

This type of polling outcome should come as no surprise to money managers in the private wealth management business.

FORBES: Taxes Or Spending Cuts? Americans Prefer Taxes

In short, barring a last-minute reversion to type as they enter the polling stations, Canadians seem to have decided to take a gamble.

ECONOMIST: And why they should vote Conservative this time

That type of depression did not happen, but our polling finds strong evidence of another kind of depression: a loss of faith in the American Dream.

FORBES: What American Dream?